<template>
  <div class="todo-header">
    <input  type="text" v-model="title" @keyup.enter="addT" placeholder="请输入你的任务名称，按回车键确认"/>
  </div>
</template>

<script>
import {mapGetters, mapState} from "vuex";

export default {
  name: "Header",
  data(){
    return{
      title:""
    }
  },
  methods:{
  addT(){
    //获取用户的输入
    const {title} = this
    if(!title.trim()) return alert('输入不能为空！')
    //包装成一个Todo对象
    const todoObj = {id:Date.now(),title,done:false}
    //通知App加一个
this.unshift(todoObj)
    //清空输入
    this.title = ''
  }
  },
  computed:{
    ...mapGetters(['addTodo']),
    ...mapState(['todos'])
  }
}
</script>

<style scoped>
/*header*/
.todo-header input {
  width: 560px;
  height: 28px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 7px;
}

.todo-header input:focus {
  outline: none;
  border-color: rgba(82, 168, 236, 0.8);
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
}
</style>